D-meson decay constants and a check of factorization in non-leptonic B-decays

Abstract

We compute the vector meson decay constants fD*, fDs* from the simulation of twisted mass QCD on the lattice with Nf = 2 dynamical quarks. When combining their values with the pseudoscalar D(s)-meson decay constants, we were able (i) to show that the heavy quark spin symmetry breaking effects with the charm quark are large, fDs*/fDs = 1.26(3), and (ii) to check the factorization approximation in a few specific B-meson non-leptonic decay modes. Besides our main results, fD* = 278 \pm 13 \pm 10 MeV, and fDs* = 311 \pm 9 MeV, other phenomenologically interesting results of this paper are: fDs*/fD* = 1.16 \pm 0.02 \pm 0.06, fDs*/fD = 1.46 \pm 0.05 \pm 0.06, and fDs/fD* = 0.89 \pm 0.02 \pm 0.03. Finally, we correct the value for B(B0 \rightarrow D+ pi-) quoted by PDG, and find B(B0 \rightarrow D+ pi-) = (7.8 \pm 1.4) \times 10-7. Alternatively, by using the ratios discussed in this paper, we obtain B(B0 \rightarrow D+ pi-) = (8.3 \pm 1.0 \pm 0.8)\times10-7.

16 pages, 4 eps figures

References in corpus (7)

• High Precision determination of the pi, K, D and D_s decay constants from lattice QCD
• Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks
• Computing K and D meson masses with N_f = 2+1+1 twisted mass lattice QCD
• Lattice QCD determination of m_b, f_B and f_Bs with twisted mass Wilson fermions
• Exploring CP Violation and Penguin Effects through $B_d^0\to D^{+}{D}^{-}$ and $B_s^0\to D_s^{+}{D}_s^{-}$
• Soft Photon Problem in Leptonic B-decays
• Exclusive $D\bar{D}$ meson pair production in peripheral ultrarelativistic heavy ion collisions

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